Spray-pump.



PATENTED AUG. 9, 190 4.

J. BEAN.

SPRAY PUMP.

APPLICATION FILED JAN. 21, 1904.

SHBET 1.

[NVENI OR 75%:7Mze0;7%

' xi /faring ZSSHEETS N0 MODEL.

PATENTED AUG. 9, 1904.

3'. BEAN.

SPRAY PUMP.

APPLIUATION FILED JAN.- 21, 1904.

2 SHEETS-SHEET 2.

N0 MODEL.

HIWH h UNITED STATES Patented August 9, 1904.

PATENT OFFICE.

JOHN BEAN, OF LOS GATOS, CALIFORNIA, ASSIGNOR TO BEAN SPRAY PUMP 00., OFSAN JOSE, CALIFORNIA.

SPHAY"PUIVIP.

SPECIFICATION forming part of Letters Patent No. 767,032, dated August9, 1904.

Application filed January 21, 1904. Serial No- 189,994. (No model.)

To all whom, it may concern).-

Be it known that I, J oI-IN BEAN, a citizen of the United States,residing at Los (i-atos, in the county of Santa Clara and State ofCalifornia, have invented certain new and useful Improvements inSpray-Pumps; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theannexed drawings, making a part of this specification, and to theletters of reference marked thereon.

The present invention has for its object to provide a spraying-pump thatwill be effective in its operation and a pump that will equalize thework at varying pressures when desired and avoid the unevenness of workand divide the pressure against the handle, so as to make it even eachWay, and improve the pump in the various details of construction,whereby a perfectly operating device will be obtained and possesssuperior results in spraying the liquid and in the general operation ofthe parts.

The invention consists in a spraying-pump constructed substantially asshown in the drawings and hereinafter described and claimed.

Figure 1 of the drawings is a perspective view of a spraying-pumpembodying my invention; Fig. 2, a sectional elevation of the cylinder,piston, and its connections; Fig. 3, a detail View of the upper portionof the piston-rod and its connections; Fig. 4, a sectional elevation ofthe base or bottom portion of the pump, showing a portion of thepump-cylinder, the piston, valves, and portion of the suction-pipe; Fig.5, a perspective view of the slotted key.

In the accompanying drawings, A repre sents the pump-cylinder, which maybe of any suitable diameter and length, as found most desirable, saidcylinder projecting from a suitable base B of any preferredconstruction.

The cylinder A communicates with a valvechamber C through a passage-waya, said chamber containing the valves 6 c of any suitableconstruction,which are supported in seats in the chamber. These valvesand their seats may be variously modified and changed in form andconstruction, as I do not wish to limit myself to the constructionshown.

The upper end of the chamber C communi cates, through a passageway (Z,with the lower end of an air and liquid tank D, said tank being shown inFig. 1 of the drawings. This tank may be of any suitable constructionand may be varied in diameter and length, as found most desirable, saidtank being subject to many changes or modifications without inanyinanner departing from the spirit of my invention, and may have a cap0 and stay-rods f connected thereto, if found preferable. The upper oropen end of the valve-chamber C may also be closed by a cap 7, held inplace by a set-screw h, engaging a bracket e, or any other suitablemeans may be provided for closing the chamber and enabling accessthereto when desired, s u ch construction being shown in Fig. 4L of thedrawings.

The base B has a passage-way j, which communicates with thevalve-chamber C and with the lower end of a suction-pipe E, and to theupper end of this pipe is suitably connected a suction hose F, providedwith a suitable strainer 71; of any preferred construction.

Any suitable form of pressure-gage Gr may be provided and communicatewith the tank D, whereby the pressure therein may be convenientlyascertained.

The pnmp-cylinder A is open at its upper end and is provided withhorizontally-extending ears r, through which pass guide-rods l, as shownin Fig. 1 of the drawings, the upper ends of the rods being secured tothe support H, which is designed to support the slotted key I (shown inFig. 5 of the drawings) when said key is brought into use. i

A cylinder J of smaller diameter than the pump-cylinder engages with thepump-cylinder and carries a coiled spring K, which spring extends aroundthe outer periphery of the cylinder J and projects below the end thereofinto the pump-cylinder. The. lower and upper ends of the spring K bearagainst the disk on and the under side of a cap L, respectively, saidcap forming the closed end of the cylinder J, and is provided withguideyokes 12. to engage the rods Z. An upwardlyprojecting tubularextension M communicates with the upper end of the cylinder J and has aplurality of notches 0, with which the key I is engaged in order to holdthe spring K under compression, as circumstances require.

In Fig. 3 of the drawings the key I is shown as engaged with one of thenotches 0, whereby the coils of the spring J may be compressed, anysuitable key being used, and any desirable means may be provided forengaging said key with the tubular extension M, the means shown beingone in many that will effect the result desired.

The pump-piston comprises the piston-head .N and piston-rod O, which maybe of the usual construction, said rod extending up through thecylinders A J and the tubular extension M and is connected in anysuitable manner to a cross-bar p. To the ends of the cross-bar p issuitably connected the upper ends of pitman-rods P, the lower ends ofsaid rods being pivotally connected to the free ends of levers Q, whichproject from a rockshaft R, said shaft having its bearing in the base Bof the pump. A suitable swinging lever S is suitably connected to therock-shaft R, by which said shaft is operated by moving pressed, asdesired.

the lever back and forth by means of the handle g at the upper end ofthe lever.

I do not wish to be understood as limiting the invention to anyspecified form and construction of the pitman-rods, the rock-shaft, andthe levers projecting therefrom, as well as the swingingoperating-lever, these features being subject to many changes orvariations without in the least departing from the essential features ofthe invention, and the general construction of the pump may be modifiedin detail so long as such modifications come within the scope of theinvention.

The spring used in the pump in connection with the means employed tocompress the same at any degree required is capable of equalizing thework at varying pressures, or when the key or other means forcompressing the spring is removed it can slide up and down withouthindrance, as the case may require. The cylinder J, around which thespring is coiled, forms a guide for the spring and sup ports it in itsproper position, as without the cylinder the upper end of the springwould not have any support, thereby providing a supporting and guidingcylinder for the spring to render it perfect in its operation. Incompressing the spring K the cylinder J ,with its cap L bearing upon theupper end of the spring, is pressed down until the proper one of thenotches 0 comes on line below the support I-I, after which the key I isengaged with the notch, as shown in Fig. 3 of the drawings, which willhold the coils of the spring com- A further advantage of the supportingand guiding cylinder J for the spring K and the compressor-cap L preventthe spring from swaying out of shape under a heavy pressure when it iscompressed.

The tubular extension M acts as a guide to the piston-rod O and the rodas a guide to the extension, one cooperating with the other when inmotion. The support H for the key I also serves as a guide to tubularextension M when the extension is moved to compress the spring, therebyserving a double functionviz., that of a support for thekey when usedand as a guide for the tubular extension.

As the piston is moved in its work the key will hold the tubularextension and the support stationary and let the piston slide through onits up motion, compressing the spring, so that the spring is now readyto assist on the pistons down motion when it does its hardest work. henthe air or fluid is to be pumped to a higher or lower pressure, the keyis removed and engaged with the notch that will insure a heavierpressure, or any degree of pressure may be secured by the adjustment ofthe key. The suction-hose F being placed in the liquid, the swinginglever S is drawn toward the operator, which will lift the piston bymeans of the pitman rods and levers connecting therewith. The key beingremoved from engagement with the tubular extension, as the piston israised the liquid is drawn in through the lower one of the valves andthrough the passage-way and into the cylinder of the pump, as indicatedby the arrows in Fig. 4 of the drawings. The swinging lever being nowpushed forward will force down the piston and drive back the liquidthrough the passageway a, but above the lower valve 0 and through theupper valve 6, thence through the passage-way (Z into the tank D.

After the operation has been repeated a few times and air is to besupplied to the tank the suction-hose F is withdrawn from the liquid,and the swinging lever S is moved back and forth, as before, which willdraw the air in place of the liquid until the pressure-gage Gr indicatestwenty or thirty pounds or any pressure that would be found desirablefor a perfect operation of the pump, the suction-hose being again placedin the liquid and the swinging lever moved back and forth.

In the. several stages of operation thus far described the coiled springK and the supporting and guiding cylinder J, with its tubular extensionM and support L, have moved up and down freely with the piston, as thesame connect with said piston in any preferred manner. It will benoticed that on the forward movement of the swinging lever when thepiston is lifted the only work accomplished is to draw the liquid or airinto the pumpcylinder, and on the return stroke of the lever when thepiston is forced down the liquid or air is forced out of the cylinderinto the tank against the accumulated pressure. Thus the work of thereturn stroke becomes increasingly heavier, while the work of theforward stroke remains constantly easier. In order to avoid thisunevenness of work and divide the pressure against the swinging lever,so as to make it even each way, the spring is compressed in thefollowing manner: The swing ing lever is thrown clear back, which willforce the piston down, so that the notches in the tubular extension willcome below the support H, after which the key I is engaged with theproper one of the notches below the support, according to the amount ofpressure wanted in the tank. The slotted key I when in position underthe support H holds the tubular extension M, cap L, and cylinder Jstationary, so that when the swinging lever S is drawn forward to suckin the liquid as the piston is raised the spring K is compressed, and onthe return stroke when the liquid is forced into the tank the springexpends its energy in assisting the Work. While the tubular extension Mand the cap L and cylinder J remain stationary, the piston-rod 0 worksfreely therethrough, while the extension forms a guide for the rod. Theyokes a, which the rods engage, hold the compressor-cap and itsconnections from turning on its axis.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is-

1. In a spray-pump, a cylinder, a piston adapted to work therein, asupporting and guiding cylinder, a spiral spring extending around thesame and projecting into the pump cylinder, and means for regulating thetension of the spring, substantially as and for the purpose described.

2. In a spray-pump, a cylinder and a piston adapted to work therein andmeans for operating said piston, a supporting and guiding cylinderengaging the pump-cylinder, a coiled spring encircling the supportingand guiding cylinder, a tubular extension upon the upper end of thesupporting and guiding cylinder -and having notches therein, and aslotted key adapted to engage the notches, substantially as and for thepurpose specified.

3. A spray-pump comprising a tank, a cylinder and piston adapted to worktherein, a supporting and guiding cylinder engaging the pump-cylinder, aspiral spring encircling the supporting and guiding cylinder, means forregulating the tension of said spring, a suction-tube, a valve-chambercommunication with the tank, pump-cylinder and suctiontube, and suitablevalves operating in said chamber, substantially as and for the purposeset forth.

In testimony whereofI aflix my signature in presence of two witnesses.

JOHN BEAN.

Witnesses:

ALF. P. LAi-IMER, WV. PEGK.

